TEN days of mail has been stolen from our 344 O'Brien Rd., Port Angeles, address...

I am so upset!!  We were gone on a 10 day trip and had the Post Office HOLD our mail.  They were to deliver it on Sat.  They said they delivered it at 12:30 pm. and now want us to believe our mail was the victim of MAIL THEFT!!  How do I let those customers who send orders with checks that the mail was stolen... I don't know which customers sent orders!  What do I do???